The present paper is an experimental study on the topic of "The Relationship between Explicit and Implicit Morpho-Syntactic Knowledge in Daf Learners: An Investigation Using the Example of the Use of Subject-Verb Congruence". This study investigates whether learners of German as a foreign language use their explicit linguistic knowledge where they are supposed to use it. This study focuses on three main questions. In order to find answers to these questions, 42 level 3 students of the German Department of the University of Yaound矇 I took two different tests: one to assess their explicit knowledge and another to test their ability to use their explicit knowledge of subject-verb congruence. The results of the analyses seem to be partially consistent with the hypotheses formulated at the beginning of the study. They also show no relationship between explicit and implicit knowledge of subject-verb congruence in these students.